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/*
 * Fast Infoset ver. 0.1 software ("Software")
 * 
 * Copyright, 2004-2005 Sun Microsystems, Inc. All Rights Reserved. 
 * 
 * Software is licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License. You may
 * obtain a copy of the License at:
 * 
 *        http://www.apache.org/licenses/LICENSE-2.0
 * 
 *    Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations.
 * 
 *    Sun supports and benefits from the global community of open source
 * developers, and thanks the community for its important contributions and
 * open standards-based technology, which Sun has adopted into many of its
 * products.
 * 
 *    Please note that portions of Software may be provided with notices and
 * open source licenses from such communities and third parties that govern the
 * use of those portions, and any licenses granted hereunder do not alter any
 * rights and obligations you may have under such open source licenses,
 * however, the disclaimer of warranty and limitation of liability provisions
 * in this License will apply to all Software in this distribution.
 * 
 *    You acknowledge that the Software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of any nuclear
 * facility.
 *
 * Apache License
 * Version 2.0, January 2004
 * http://www.apache.org/licenses/
 *
 */ 

package com.sun.xml.fastinfoset.stax.events;

import javax.xml.namespace.QName;
import javax.xml.stream.events.Namespace;

import com.sun.xml.fastinfoset.stax.events.Util;

public class NamespaceBase extends AttributeBase implements Namespace{
    //J2SE1.5.0 javax.xml.XMLConstants
    static final String DEFAULT_NS_PREFIX = "";
    static final String XML_NS_URI = "http://www.w3.org/XML/1998/namespace";
    static final String XML_NS_PREFIX = "xml";
    static final String XMLNS_ATTRIBUTE_NS_URI = "http://www.w3.org/2000/xmlns/";
    static final String XMLNS_ATTRIBUTE = "xmlns";
    static final String W3C_XML_SCHEMA_NS_URI = "http://www.w3.org/2001/XMLSchema";
    static final String W3C_XML_SCHEMA_INSTANCE_NS_URI = "http://www.w3.org/2001/XMLSchema-instance";
    
    //is this namespace default declaration?
    private boolean defaultDeclaration = false;
    
    /** a namespace attribute has a form: xmlns:NCName="URI reference" */
    public NamespaceBase(String namespaceURI) {
        super(XMLNS_ATTRIBUTE, "", namespaceURI);
        setEventType(NAMESPACE);
    }

  /**
   * Create a new Namespace
   * @param prefix prefix of a namespace is the local name for an attribute
   * @param namespaceURI the uri reference of a namespace is the value for an attribute
   */
    public NamespaceBase(String prefix, String namespaceURI){
        super(XMLNS_ATTRIBUTE, prefix, namespaceURI);
        setEventType(NAMESPACE);
        if (Util.isEmptyString(prefix)) {
            defaultDeclaration=true;
        }
    }
    
    void setPrefix(String prefix){
        if(prefix == null)
            setName(new QName(XMLNS_ATTRIBUTE_NS_URI,DEFAULT_NS_PREFIX,XMLNS_ATTRIBUTE));
        else// new QName(uri, localpart, prefix)
            setName(new QName(XMLNS_ATTRIBUTE_NS_URI,prefix,XMLNS_ATTRIBUTE));
    }
    
    public String getPrefix() {
        if (defaultDeclaration) return "";
        return super.getLocalName();
    }
    
    
  /**
   * set Namespace URI reference (xmlns:prefix = "uri")
   * @param uri the uri reference of a namespace is the value for an attribute
   */
    void setNamespaceURI(String uri) {
        setValue(uri);
    }
    public String getNamespaceURI() {
        return getValue();
    }
    

    public boolean isNamespace(){
        return true;
    }
    
    public boolean isDefaultNamespaceDeclaration() {
        return defaultDeclaration;
    }
    

}